Perhaps you’ve heard of HTTP/2? It’s not just an idea, it’s a real technology and slowly but surely, hosting companies and CDN services have been releasing it to their servers. Much has been said about the benefits of using HTTP/2 instead of HTTP1.x, but the proof the the pudding is in the eating.

Today we’re going to perform a few real-world tests, perform some timings and see what results we can extract out of all this.

Scott Jehl, explaining one of the performance improvements he made to the Filament Group site:

Inlining is a measurably-worthwhile workaround, but it’s still a workaround. Fortunately, HTTP/2’s Server Push feature brings the performance benefits of inlining without sacrificing cacheability for each file. With Server Push, we can respond to requests for a particular file by immediately sending additional files we know that file depends upon. In other words, the server can respond to a request for `index.html` with `index.html`, `css/site.css`, …